The "heart" of your whole-house humidifier, the Water Panel (also known as humidifier filter, water pad, evaporator pad), should be changed at least once per heating season. The pad is constructed of an expanded aluminum honeycomb mesh that is dipped in a clay coating. This coating is able to absorb and hold water. Warm, dry air is forced through the wet pad to introduce water vapor into the home.

Product Features:

Factory original OEM part

Dimensions approximately - 9-1/2" x 9-3/4" x 1-1/2"

Pad change instructions are printed on product carton

Fits the Following Humidifiers:

Aprilaire 110

Aprilaire 220

Aprilaire 500

Aprilaire 550

Aprilaire 558

Humidifier water panels (sometimes referred to as a filter) are a regular replacement item in whole-house humidifiers. For the best performance we recommend that the Water Panel be replaced once a year, either prior to the start or at the end of the heating season. If you have especially hard water - the panel can be replaced 2 times per year.

Received and installed in less time than when professional HVAC company could schedule ordering the filter and the house call to install it. There was absolutely no visible difference in the filter being replaced from the new one.

My old one had been in service for 2 years...The furnace technician said it really would not need to be changed....I want to make sure it works at capacity all winter...Easy to replace...would purchase again

Received and installed in less time than when professional HVAC company could schedule ordering the filter and the house call to install it. There was absolutely no visible difference in the filter being replaced from the new one.

My old one had been in service for 2 years...The furnace technician said it really would not need to be changed....I want to make sure it works at capacity all winter...Easy to replace...would purchase again

The "heart" of your whole-house humidifier, the Water Panel (also known as humidifier filter, water pad, evaporator pad), should be changed at least once per heating season. The pad is constructed of an expanded aluminum honeycomb mesh that is dipped in a clay coating. This coating is able to absorb and hold water. Warm, dry air is forced through the wet pad to introduce water vapor into the home.

Product Features:

Factory original OEM part

Dimensions approximately - 9-1/2" x 9-3/4" x 1-1/2"

Pad change instructions are printed on product carton

Fits the Following Humidifiers:

Aprilaire 110

Aprilaire 220

Aprilaire 500

Aprilaire 550

Aprilaire 558

Humidifier water panels (sometimes referred to as a filter) are a regular replacement item in whole-house humidifiers. For the best performance we recommend that the Water Panel be replaced once a year, either prior to the start or at the end of the heating season. If you have especially hard water - the panel can be replaced 2 times per year.